Fire-extinguisher.



' FIRE EXTINGUISHER.

Patented Mar. 19, 1918.

@MM-c E. SCHAEFER & 0.1. HOLMES.

FIRE EXTINGUISHER.

APPLICATION FILED DEC. I6|l9l3 L259J83. h Patented Mar. 19, 1918.

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II III IIIIIII III EDWARD SCHAEFER AND OSCAR J. HOLMES, ST. LOUIS,MISSOURI, ASSIGNORS T0 ONOFREZO FIRE EXTINGUISHER MANUFACTURING COMPANY,OF ST. LOUIS, MIS- SOURI, A CORPORATION OF MISSOURI.

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To all whom t may concern:

Be it lmown that we, EDWARD -SoHAErnR and OSCAR J. HOLMES, citizens ofthe United States, and residents of St. Louis Missouri have inventedcertain new and useful Improvements in Fire-Extinguishers, of which thefollowing is a specification containing a full7 clear, and exactdescription, reference being had to the accompanying drawings, l

invention is to provide a novel means common to both for simultaneouslyfreein the expelling substance and re extingui ing compound.

With the above purposes in view our invention consists in certain novelfeatures of construction and arrangement of parts as will'be hereinaftermore full described, pointed out in the claims and il ustrated by theaccompanying drawings, in which- Figure 1 is an elevation of ourimproved re extinguisher;

Fig. 2 is a plan of the extinguisher;

Fig. 3 is a lan showing ourr improved means for hol mg and opening theduplex receptacle for the expelling substance.

Fig. 4 is a vertical2 sectional elevation of the complete extinguisher;

Fig. 5 is an enlarged fragmental elevation partly in sectionillustrating our novel nozzle opening means; and

Fig. 6 is a sectional bottle breaking means. A

Referring by numerals to the accompanying drawings:

7 designates the body portion of the extinguisher which in the presentinstance is preferably constructed from a single'piece of seamlesstubing at the upper end of the body portion 7 and therewithin is aninter- Specicationof Letters Patent.

plan illustrating the Patented Mar. 19, 1913.

Application led December 16, 1913. Serial No. 806,995.

nally threaded ring 8 providing means for the attachment of a screw cap9.

Formed on the upper face of the cap 9 is a pair of diametrlcallyopposite integral ribs 10 whichproject free above the upper surface ofsaid cap and alford a means for applying a Spanner to assist in theplacing or removal of the cap.

In one of the ribs there is'formed a bore 11 which has at its outer enda threaded seat 12 arranged to receive a nozzle 13 and the inner end ofthe bore is threaded as at 14 to receive a plug 15 which plug, asclearly shown in Fig. 5, is hollow for a portion of its length andwithin the length of the hollowed out portion is provided with a reducedneck 16 whereby the plug may be readily broken for purposes hereinaftermade clear.

The cap'9 is provided with a vertical and' centrally disposed aperturesurrounded by a threaded neck 17 arranged to receive a a stem 19 havingat its upper end a knob 2O for its operation and at its lowerend with-'stuffing-box 18 through which is extended J in the body 7 is aninternally threaded holder in the form of an inverted cup 21.

Impinging between the knob 20 and the cap 9 and surrounding the stem 19is a coil spring 22 arranged to normally hold the stem 19 elevated.

Carried by the stem 19 is a collar 23 which serves the double functionof limiting the .upward movement of the stem and also as a means toengage the plug 15 when it is desired to free the contents of theextinguisher. Permanently secured to thebody 7 of the extinguisher is acup-shaped base 24.

At the upper end of the base 24 there is a shoulder 25 which forms aseat for a pair of crossed straps 26 in each of which at theirintersecting oints there is a threaded aperture arranged3 to receive thethreaded end of a rod 27 the lowermost end of which extends through thebottom of the base and has secured thereto a handle 28 to facilitate thehandling of the extinguiser.

member of the watertight duplex receptacle hereinbefore referred to.This can is provided with a thin tin bottom 32 and with a reducedthreaded neck 33 in the approximate center of which bottom there isformed aseat 34 to receive the stem 35 of a crow foot 35a. By the wordcan we mean a receptacle made of any suitable material, and althoughinthe present illustration of our invention this can is shown anddescribed as made of sheet-metal, yet We do not limit ourselves to thatmaterial, and wish it tofbe clearly understood that this receptacle 31is to be made of any other material, whenever the circumstances indicatethat the use of another material would be preferable to sheet-metal.

36 designates a bottle having a reduced neck 37 in which there is fitteda plate 38 arranged to support a seal 39. The can is secured in place byhaving its reduced neck threaded into the holder 21.

In the portion of the can not occupied by the bottle there is placed aquantity of b1- carbonate of soda and in the bottle there is placed aquantity of sulfuric acid. It will 'thus be seen that both the bottleand the bicarbonate of soda arey sealed within said watertight can.

In Fig. 4 the extinguisher is shown fully charged and in condition foruse. The practical operation of the device is as follows:

The extinguisher is grasped by the handle 28 and inverted, the operatorthen strikes the knob 20 upon the ground or floor Which causes amovement of the stem 19 which movement presses the acid containing bodyagainst the crow foot, which breaks the bottle and drops the bicarbonateof soda (which the bottle had previously held against the force ofgravity) into the sulfuric acid; this movement of the stem 19 also movesthe thin tin bottom of the can to engage with the cutters 30, thusforming openings in the can for the discharge of the carbonio acid gasresulting from the combination of bicarbonate of soda and sulfuric acid.

When the extinguisher is in this inverted position the fireextinguishing fluid is moved by gravity to a position uncovering -theopenings formed in the thin tin bottom. The movement of the stem 19 alsocauses the collar 23 to engage the end of the plug 15 and break it atits reduced neck portion, the dropping of the bicarbonate of soda intothe sulfuric acid causing instantaneous pressure Within the extinguisherbody. The

extinguisher is then ready for use and the verse construction, that ismeans for dropthat the sulfuric acid and soda are combined to producethe expelling gas.

We claim:

l. In a fire-extinguisher, a container, a breakable sealed nozzle forsaid container, a yielding support within said container', a sealedwatertight duplex receptacle within said container and connected tosaid'supportl land having sealed within it separate inert substances,means movable with said support for breaking the seal of saidnozzle,means lying in the path of movement of said duplex receptacle foruniting said inert substances, and means lying in the path of saidreceptacle for establishingv communication between said receptacle andsaid container. 2. In a lire extinguisher, a container having aremovable closure, a breakable sealed nozzle carried by said closure, ayieldingly mounted stem operating through said closure arranged toengage said nozzle when moved, a receptacle for an expelling agencysecured to and movable with said stem, and means in the path of movementof said receptacle for establishing a communication between saidreceptacle and said container when said stem is moved.

3. In a lire extinguisher, a support Within said extinguisher, ahermetically sealed can arranged for detachable connection With saidsupport, an alkali and a bottle Within said can, and a bottle breakingelement within said can. I

4. In'combination with a re extinguisher arranged to contain a fireextinguishing substance and a support Within said fire extinguisher, adevice, designed for use as an expelling agent for said extinguishingsubstance, comprising a hermetically sealed receptacle, means carried bysaid receptacle for detachable connection with said support,`an alkaliand a frangible element within said receptacle, and means in saidreceptacle for breaking said frangible element.

5. In a lire-extinguisher, a suitable tank or container, a cap threadedto one end of said container and having upon its upper surface twodiametrically-opposite ribs,one of which is provided with a borecommunicating with they interior of said tank during active use of thefire-extinguisher, a nozzle in said bore, and suitable means Within saidtank for ejecting a liquid through said bore and said nozzle.

6. As a new article of manufacture, a charging-can, for chemical fireextinguishers, comprisinga sheet-metal can containing a bottle of acidand a quantity of dry substance which' is separate from said acid Athebottle, means withinand adapted toibe dropped into sad'aeid when saidbottle is broken, combination with a bottle-breaking element alsolocated within said charging-can, and screw threads at one end of saidcan for detachably securing it to a support furnished therefor in a fireextinguisher.

7. A charging element for chemical fire extinguishers, comprising aquantity of liquid and a quantity of dry substance, a separate containerfor each, the one container arranged to hold the one substance as wellas the container for the ,other substance, means carried by the outercontainer for detachably connecting it with a support furnished thereforin a irev extinguisher and means, within the outer container, fordestroying the inner container when impacted.

8. A charging element for chemical fireA extinguishers, comprising asuitable re ceptaele,.a quantity of dry substance in'. the saidreceptacle, a frangible bottle Within the receptacle, a quantity ofliquid within the receptacle for breaking the bottle when the receptacleis impacted, and means carried by the\ receptacle for detachablysecuring it to a support furnished therefor in a fire extinguisher.

9. A chemical lire apparatus comprising a tank, two non-communicatingcontainers supported in said tank one above the other, a breakableclosure for one of said containers, a breakable partition between Saidcontainers, and manipulative means for breaking said closure yand saidpartition whereby the contents of said containers areJ brought togetherto form a gas for the purpose of producing a pressure uponthe liquidcontained in said tank.

In testimony whereof, we have signed our names to this specification, inpresence of two subscribing witnesses.

EDWARD SCHAEFER. OSCAR J. HOLMES. Witnesses: E. L. WALLACE,

N. G. BUTLER.

